Process of recovering rosin from collected crude matter



Thecollected crude materials, such `as dross The and skimmings, are placed in a still. temperature in the still is brought up slowly until all of the loW boiling constituents such as Water and turpentine are driveno'.

Vhigh vacuum of from 0.01 to 50 mm. absolute pressure is then applied to the still, andthe temperature quickly raised to 200"J C. to

350 C.,`preferably 200 to 28500;, at whichy temperatures rosin distills over and is con` y densed. T he distillation visrcarried on from the beginnlngwith or Without the use of an inactive gas or vapor.

- gas or vapor at a temperature of from 245 C.

to5350 C., preferably around 2859 G.,for ten` minutes or more, depending; on the temperatures 'and pressures fuseda'nd 'the nature Aof tlie distilled product. The higherfthe'temperature the shorter fxvillbe the time required. The rosin is tinall'yecooled-"as quickly as possible and'discharged frointhe heating vessel into proper containers at a relatively low temperature., f

By means oftheabove process, dross and skimmings and other collected crude matter, yield Va rosin product which is comparable Witlithe best grade of rosin, Which heretofore was Vapparently not obtainable Vfrom ishereby placed on a highly paying basis. The term Vcollected crudezmatterfta's used inthe claims, includes batting and strainer" dross, cup skimmings, and such other Waste matter which is collectedin the generalplant operationsfduring the production of rosin,

and having vthefproportionof rosin set forth in connection With the process of this inven` tion. Y

product obtained by distillationis described as simply that of heating the'niaterial in an ditions defined.

What We claim -is 1. Thej process of recoveringrosin from collected crude matter includingfbatting and strainer dross and cup skimmings 'which process VVconsists Vin' heating such collected crude matter until .all of the turpentine, Water, and, other easily volatilized matter present is distilled oli leaving a residue containing rosin, heating the residue to distill olf the rosin in the presence of an inactive gas, and then heating, Without distillation,fthe

rosin distillate obtained from the residuein the presence of'an inactive gas until-'a clear high grade non -crystallizing rosin is' obf tained. v v

" coll'ected crudey matter including batting and strainer drossandcup skimmings,"which The rosin distillate is then heated in an atmosphere of an inactive non-crystallizing rosin is obtained.

such sources. VThis'fphase of rosin recovery;

It will be noted tha-tithe treatment oftheatmosphere of inactive gases under the con-- 2. The process Vof recoveringnrosin from'V present is distilled of leaving a residue containing rosin, heating the residue to distill otl the rosin in the presence of an inactive gas, and then heating, Without distillation, the rosin distillate obtained from the residue in the presence of an inactive gas at a temperature of from 245 C. to 350 C.-until a clear high grade non-crystallizing rosin is obtained. l

3. The process of recovering rosin from collected lcrude matter including batting strainer dross and cup skimmings, which process consists in heating such collected crudef matterfnntil all of the turpentine, Water-,and other easily volatilized matterV present isdi'stilled oi' `leaving a residue' containing rosin,heating the residue and distillingrotf the rosin under a high vacuum at a temperatureof from 200, C. to 350 C. in the pre'sencefof an inactive gas, and then heatingjvvithut distillation the rosin distilL late obtained fromV the residue in the presence of an inactive gas at a temperature of from 24];5C V C. to 350o C. until alclear high grade b 4; The process of recovering rosin from collected crude matter including batting and strainer drossand cup skimmings, 'which process 'consists in heating such collected CrUde-Tmatter until all of the turpentine, iti

" Water, and other `easily volatilized matter i Water, and other easily volatilized matter present is distilled o' leaving a residue con- H0 ytaining rosin, steam distil'ling the residue at a temperatureof from 2005. 'to y3150" C. to distill -otli the rosin, and'then heat-ing With-` out distillation "the rosin distillate from the H residuein the presence of steam at a temperature of fro1n245 C. to 350 C; until a clear high grade non-crystallizing rosin is obtained. f

In testimony whereof We affix our signaprocess consists in Vheating such collected:

crude: matter untilV vall of the turpentine,

-65 Water, andl other. easily volatilizedmatter tures.- v is!) f .ARTHURl R. HITCH. mvrN A. EBAUGH.

l `ist 

